Simply Auxiliary Bulb - 12V 21W BA15S
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Simply S382BL 382 (P21W) Auxiliary Bulb Blister 12V 21W Base BA15S PerformanceFree delivery in 1–3 days£5.99Visit shop →
Product Information
Full details
The Simply Auxiliary Bulb (S382BL) is a high-visibility replacement lighting solution designed for vehicle stop and indicator lamp assemblies, making it an essential component for routine car maintenance. It is ideal for drivers who need a reliable, high-performance light source to ensure they remain visible to other road users, though users should ensure their vehicle requires the specific BA15S single-contact base configuration before installation.
All features
| Model Part Number | S382BL |
|---|---|
| Brand | Simply |
Extended Product Information
FAQs
Is this bulb compatible with my car?
This bulb uses a BA15S base. Please check your vehicle's owner's manual or the markings on your existing bulb to confirm it requires a BA15S 12V 21W bulb.
Can I use this for my headlights?
No, this is an auxiliary bulb designed for indicator and stop lights. It does not provide the correct beam pattern or intensity required for forward-facing headlights.
Does it matter which way the bulb goes in?
The BA15S base is a single-contact bayonet. While it only fits one way into the socket, always ensure it is pressed down and twisted until it locks firmly.
Why is it important not to touch the glass?
Oils from your skin create hot spots on the glass surface during operation, which can lead to uneven thermal expansion and premature bulb failure.
Should I replace both bulbs at the same time?
It is recommended to replace bulbs in pairs for stop and indicator lights to ensure consistent brightness and lifespan across both sides of the vehicle.
Troubleshooting
Bulb does not illuminate after installation
Check that the bulb is fully seated in the socket and that the electrical contacts are clean and free of corrosion.
Rapid flashing (Hyper-flash) of indicators
Ensure the wattage matches your vehicle's requirements; if you replaced an LED with this incandescent bulb or vice versa, the flasher relay may need adjustment.
Bulb flickers or fails intermittently
Inspect the socket for loose wiring or damaged contact tabs that may be preventing a constant power connection.
Pros and Cons
Pros
- Consistent and reliable brightness
- Easy to install without special tools
- Compatible with a wide variety of vehicle makes and models
- Standardized BA15S base design
- Ensures compliance with vehicle lighting standards
Cons
- Specific to 12V systems only
- Not compatible with wedge-base or offset-pin (BAY15D) sockets
- Requires careful handling to avoid skin oil deposits on the glass
Setup, Compatibility & Care
Installation of the Simply Auxiliary Bulb is simple and requires no specialized tools. Ensure the vehicle's ignition is off and the light switch is in the 'off' position before beginning. Access the tail light assembly as per your vehicle owner's manual, remove the old bulb by pushing down gently and twisting counter-clockwise, and insert the new bulb by aligning the pins with the slots, pushing down, and twisting clockwise until it locks.
Compatibility Note: Verify that your vehicle housing specifically calls for a BA15S base. Avoid touching the glass envelope of the new bulb with bare fingers, as oils from your skin can cause hot spots and premature failure; use a clean cloth or gloves for installation.
Care Tip: Periodically inspect your vehicle's lighting assemblies for moisture or debris, which can affect the electrical contact points for your bulbs.